LOL... I never considered this a scary movie. It wasn't that scary- if I'm remembering the movie correctly anyways.
And the first wife (Nkauj Kub Kaws) and husband didn't kill the second wife (Nkauj Zuag Paj)-- only the first wife killed the second wife. The husband had nothing to do with the murder.
And if it's this movie, there
is a second part. I remember it was about how his 2nd wife was still looking for him (even though I thought she went away at the end of Part 1). They had to change his name to something else so the ghost couldn't find him. His family wasn't supposed to call him by his Mos Si Ceeb name anymore. But I think someone slipped and said it and so she found him... I can't remember the ending though.
It never made sense to me why they made Part 2 when Part 1 seemed like a complete enough movie/ending. Part 2 wasn't that good either, which is why some people might not remember it.